<script type="text/javascript" src="js/jquery-3.1.0.js"></script>
<style type="text/css">
    * {
padding: 0px;
margin: 0px;
}
a {
text-decoration: none;
}
ul {
list-style: outside none none;
}
.slider, .slider-panel img, .slider-extra {
width: 916px;
height: 300px;
}
.slider {
text-align: center;
margin: 1px auto;
position: relative;
}
.slider-panel, .slider-nav, .slider-pre, .slider-next {
position: absolute;
z-index: 8;
}
.slider-panel {
position: absolute;
}
.slider-panel img {
border: none;
}
.slider-extra {
position: relative;
}
.slider-nav {
margin-left: -51px;
position: absolute;
left: 50%;
bottom: 4px;
}
.slider-nav li {
background: #3e3e3e;
border-radius: 50%;
color: #fff;
cursor: pointer;
margin: 0 2px;
overflow: hidden;
text-align: center;
display: inline-block;
height: 18px;
line-height: 18px;
width: 18px;
}
.slider-nav .slider-item-selected {
background: blue;
}
.slider-page a{
background: rgba(0, 0, 0, 0.2);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#33000000,endColorstr=#33000000);
color: #fff;
text-align: center;
display: block;
font-family: "simsun";
font-size: 22px;
width: 28px;
height: 62px;
line-height: 62px;
margin-top: -31px;
position: absolute;
top: 50%;
}
.slider-page a:HOVER {
background: rgba(0, 0, 0, 0.4);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#66000000,endColorstr=#66000000);
}
.slider-next {
left: 100%;
margin-left: -28px;
}
</style>

<script type="text/javascript">
    $(document).ready(function() {
        var length,
            currentIndex = 0,
            interval,
            hasStarted = false, //是否已经开始轮播
            t = 3000; //轮播时间间隔
        length = $('.slider-panel').length;
        //将除了第一张图片隐藏
        $('.slider-panel:not(:first)').hide();
        //将第一个slider-item设为激活状态
        $('.slider-item:first').addClass('slider-item-selected');
        //隐藏向前、向后翻按钮
        $('.slider-page').hide();
        //鼠标上悬时显示向前、向后翻按钮,停止滑动，鼠标离开时隐藏向前、向后翻按钮，开始滑动
        $('.slider-panel, .slider-pre, .slider-next').hover(function() {
            stop();
            $('.slider-page').show();
        }, function() {
            $('.slider-page').hide();
            start();
        });
        $('.slider-item').hover(function(e) {
            stop();
            var preIndex = $(".slider-item").filter(".slider-item-selected").index();
            currentIndex = $(this).index();
            play(preIndex, currentIndex);
        }, function() {
            start();
        });
        $('.slider-pre').unbind('click');
        $('.slider-pre').bind('click', function() {
            pre();
        });
        $('.slider-next').unbind('click');
        $('.slider-next').bind('click', function() {
            next();
        });
        /**
         * 向前翻页
         */
        function pre() {
            var preIndex = currentIndex;
            currentIndex = (--currentIndex + length) % length;
            play(preIndex, currentIndex);
        }
        /**
         * 向后翻页
         */
        function next() {
            var preIndex = currentIndex;
            currentIndex = ++currentIndex % length;
            play(preIndex, currentIndex);
        }
        /**
         * 从preIndex页翻到currentIndex页
         * preIndex 整数，翻页的起始页
         * currentIndex 整数，翻到的那页
         */
        function play(preIndex, currentIndex) {
            $('.slider-panel').eq(preIndex).fadeOut(500)
                .parent().children().eq(currentIndex).fadeIn(1000);
            $('.slider-item').removeClass('slider-item-selected');
            $('.slider-item').eq(currentIndex).addClass('slider-item-selected');
        }
        /**
         * 开始轮播
         */
        function start() {
            if(!hasStarted) {
                hasStarted = true;
                interval = setInterval(next, t);
            }
        }
        /**
         * 停止轮播
         */
        function stop() {
            clearInterval(interval);
            hasStarted = false;
        }
        //开始轮播
        start();
    });
</script>

<div class="slider">
    <ul class="slider-main">
        <li class="slider-panel">
            <a href="http://www.jb51.net" target="_blank"><img alt="关注脚本之家" title="关注脚本之家" src="images/1111.jpg"></a>
        </li>
        <li class="slider-panel">
            <a href="http://www.jb51.net" target="_blank"><img alt="关注脚本之家" title="关注脚本之家" src="images/22222.jpg"></a>
        </li>
        <li class="slider-panel">
            <a href="http://www.jb51.net" target="_blank"><img alt="关注脚本之家" title="关注脚本之家" src="images/33333.jpg"></a>
        </li>
        <li class="slider-panel">
            <a href="http://www.jb51.net" target="_blank"><img alt="关注脚本之家" title="关注脚本之家" src="images/prod4.jpg"></a>
        </li>
    </ul>
    <div class="slider-extra">
        <ul class="slider-nav">
            <li class="slider-item">1</li>
            <li class="slider-item">2</li>
            <li class="slider-item">3</li>
            <li class="slider-item">4</li>
        </ul>
        <div class="slider-page">
            <a class="slider-pre" href="javascript:;;"><</a>
            <a class="slider-next" href="javascript:;;">></a>
        </div>
    </div>
</div>